全套管全回轉灌注樁套管內氣舉反循環清孔施工技術
  • 作者: 李樹青,雷斌,鮑萬偉,等
論文摘要

 

全套管全回轉灌注樁套管內氣舉反循環清孔施工技術

李樹青,雷斌,鮑萬偉,馮志輝,申小平

(深圳市工勘巖土集團有限公司,廣東 深圳 518063)

[摘要]當在復雜地層采用全套管全回轉施工時,遇地下水豐富時,孔底沉渣采用撈渣斗撈渣或常規氣舉反循環清孔,撈渣斗清孔難以清除干凈,氣舉反循環清孔配套設備多,安裝時間長;由此提出全套管全回轉灌注樁套管內氣舉反循環清孔施工技術,對其原理、流程、操作要點、實施效果進行了系統闡述。工程實踐表明,本項技術在工程應用中取得了顯著成效,具有清孔設備便捷、孔底沉渣清理效果好、降低施工成本、保證現場文明施工等優點,簡便的操作性和良好的安全可控性使其易于技術推廣,是一種施工工藝上的突破和創新。

[關鍵詞]全套管;全回轉;灌注樁;套管;清孔;氣舉反循環;施工技術

[中圖分類號]TU753         [文獻標識碼]A         [文章編號]2097-0897(2021)23-0146-04

Construction Technology of Air Lift Reverse Circulation Hole Cleaning for Cast-in-place Pile with Full Casing and Full Rotation

LI Shuqing, LEI Bin, BAO Wanwei, FENG Zhihui, SHEN Xiaoping

(Shenzhen Gongkan Geotechnical Group Co.,Ltd., Shenzhen, Guangdong 518063, China)

Abstract: When implementing full casing and full rotation construction in the complex stratum with rich groundwater, the settled sludge at the bottom is removed by slag hopper or conventional gas lift reverse circulation. It is difficult to clean the hole with slag hopper, and the reverse circulation cleaning of gas lift causes equipment and time. Therefore, this paper suggests the construction technology of the air lift reverse circulation hole cleaning for cast-in-place pile with full casing and full rotation. The principle, process, key points of operation and effect are described systematically. Engineering practice shows that the technology has achieved remarkable results in engineering application with the advantages of convenient hole cleaning equipment, good cleaning effect of bottom settled sludge, reducing construction cost and ensuring civilized construction on site. It is a breakthrough and innovation in construction technology because of its simple operation and good safety controllability.

Keywords: full casing;full rotation;cast-in-place piles;casing pipe; hole cleaning;air lift reverse circulation;construction

[作者簡介]李樹青,助理工程師,Email954182382@qq.com

 

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